From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 2 Nov 2018 13:22:25 +0000 (+0100)
Subject: sched/topology: Fix off by one bug
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=993f0b0510dad98b4e6e39506834dab0d13fd539;p=linux.git

sched/topology: Fix off by one bug

With the addition of the NUMA identity level, we increased @level by
one and will run off the end of the array in the distance sort loop.

Fixed: 051f3ca02e46 ("sched/topology: Introduce NUMA identity node sched domain")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 9d74371e4aad8..8d7f15ba59163 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -1337,7 +1337,7 @@ void sched_init_numa(void)
 	int level = 0;
 	int i, j, k;
 
-	sched_domains_numa_distance = kzalloc(sizeof(int) * nr_node_ids, GFP_KERNEL);
+	sched_domains_numa_distance = kzalloc(sizeof(int) * (nr_node_ids + 1), GFP_KERNEL);
 	if (!sched_domains_numa_distance)
 		return;